CN114424709A - Castor cleaning device and castor combine harvester - Google Patents

Abstract

The invention discloses a castor cleaning device and a castor combined harvester, wherein the castor cleaning device is provided with a cylindrical cleaning channel which is formed between an arc-shaped screen and an arc-shaped top plate; a plurality of pushing plates are arranged on the inner wall of the arc-shaped top plate in a linear array mode, the pushing plates are sheet-shaped, and two ends of the pushing plates are staggered in the axial direction of the arc-shaped top plate; a finger-pushing assembly is arranged in the cleaning channel and is provided with a plurality of groups of fingers; the finger-pushing assembly can integrally and actively rotate relative to the arc-shaped screen, and a rotating shaft of the finger-pushing assembly is coaxial with a central shaft of the cleaning channel. According to the invention, the material harvested by the picking platform enters the cleaning channel, under the rotating action of the finger-pushing assembly, on one hand, the material is sufficiently stirred, so that the ricinus capsule in the material is separated and passes through the sieve mesh of the arc-shaped sieve screen, on the other hand, the pushing plate on the arc-shaped top plate pushes the material to move in the cleaning channel, so that the separation of the capsule from the branches and leaves is realized, the cleaning effect is good, and the impurity content rate of the obtained ricinus capsule is low.

Description

Castor cleaning device and castor combined harvester

Technical Field

The invention relates to the technical field of agricultural machinery, in particular to a castor cleaning device and a castor combined harvester.

Background

The castor-oil plant is also called hemp seed and grass hemp, is an important chemical raw material and strategic material, is widely applied to the fields of aviation, chemical engineering, automobiles, spices, medicines and the like, and is an industrial vegetable oil source with comprehensive development potential. The mechanized level of castor harvesting production in China is lower, and domestic castor harvesting work is basically completed manually. The manual harvesting has the defects of high labor intensity, low efficiency, high waste rate, poor working environment and the like; in addition, the castor industry is limited in development by labor shortages and price increases. At present, domestic research reports on castor harvesters are few, the harvesting principle of the castor harvesters is improved on the basis of a corn harvester, and the castor harvesters cannot be completely adapted to the growth characteristics of castor; and the separation of the ricinus communis capsule and the stem is not realized in the harvesting process, the loss in the harvesting process is large, and the breakage rate is high.

Another invention CN108901340A of the applicant provides a castor bean harvester, in which when castor beans are conveyed to a storage and transportation box body by a pneumatic conveying device, a separating device for separating conveyed materials from air flow is arranged on the box body, and in practical use, the device has limited function, only can realize separation of air flow and materials, and materials falling into the box body not only contain castor capsules, but also are mixed with a large amount of sundries such as stalks and the like, so that the sundries need to be cleaned manually or by special equipment after being harvested, thereby increasing working procedures, influencing efficiency and increasing cost.

Disclosure of Invention

The purpose of the invention is as follows: in order to overcome the defects in the prior art, the invention provides the castor cleaning device and the castor combine harvester which can effectively clean the harvested materials and reduce the impurity rate of the castor.

The technical scheme is as follows: in order to achieve the purpose, the castor cleaning device is provided with a cylindrical cleaning channel, and the cleaning channel is formed between an arc-shaped screen and an arc-shaped top plate;

a plurality of pushing plates are arranged on the inner wall of the arc-shaped top plate in a linear array mode, the pushing plates are sheet-shaped, and two ends of each pushing plate are staggered in the axial direction of the arc-shaped top plate;

a finger-moving assembly is arranged in the cleaning channel and is provided with a plurality of groups of fingers; the poking finger assembly can integrally and actively rotate relative to the arc-shaped screen, and the rotating shaft of the poking finger assembly is coaxial with the central shaft of the cleaning channel.

Further, in the traveling direction of the material, the rear end of the arc-shaped top plate is located further rearward than the rear end of the arc-shaped screen.

Furthermore, the front end of the cleaning channel is connected with a material input device.

Further, the material input device comprises a cover body butted with the front end of the cleaning channel and an auger arranged in the cover body; the cover body is provided with a material inlet; the screw feeder and the finger-dialing component are coaxially arranged and can actively rotate relative to the cover body.

Further, the finger-dialing component comprises a plurality of groups of fingers arranged in a circumferential array; the same group of the shifting fingers are fixed on a shifting finger support, and the position of the shifting finger support can be adjusted in the radial direction of the arc-shaped screen.

Furthermore, the arc-shaped screen comprises a plurality of arc pieces and a plurality of rod pieces, all the arc pieces are linearly arranged in the axial direction of the arc-shaped screen at equal intervals, and all the rod pieces are arranged in an arc-shaped array around the central axis of the arc pieces; each rod piece and each arc piece are connected;

or the arc screen comprises an arc plate with a plurality of screen holes and a plurality of reinforcing ribs fixed on the arc plate.

A castor combined harvester comprises the castor cleaning device and a movable vehicle body; a picking platform and a fruit collecting box are respectively arranged on the front side and the rear side of the movable vehicle body;

the castor cleaning device is arranged on the upper side of the fruit collecting box;

the mobile vehicle body is also provided with a pneumatic conveying device used for conveying the materials obtained by the picking platform to the castor cleaning device.

Furthermore, a straw crushing and returning device is arranged on the lower side of the movable trolley body.

Further, the picking platform comprises a plurality of picking units and a transverse conveying device connected with the conveying pipeline; each picking monomer comprises a picking monomer frame, and two grain dividers, two picking rollers and two longitudinal conveying devices are symmetrically arranged on the picking monomer frame;

the crop divider is arranged at the front end of the picking monomer frame and is used for guiding castor crops to a position between the two harvesting rollers;

the harvesting roller is used for brushing the ricinus capsule, and the brushed material is conveyed to the transverse conveying device by the longitudinal conveying device towards the rear side.

Has the advantages that: according to the castor cleaning device and the castor combined harvester, the material harvested by the picking platform enters the cleaning channel, and under the rotating action of the finger-pushing assembly, on one hand, the material is fully stirred, so that the castor capsule in the material is separated and passes through the sieve mesh of the arc-shaped sieve, and on the other hand, the pushing plate on the arc-shaped top plate pushes the material to move in the cleaning channel, so that the separation of the capsule and the branches and leaves is realized, the cleaning effect is good, and the impurity rate of the obtained castor capsule is low.

Drawings

FIG. 1 is a first perspective view of a castor cleaning plant;

FIG. 2 is a second perspective view of the castor cleaning plant;

FIG. 3 is a front view of the castor cleaning plant;

FIG. 4 is a combination view of the arcuate top plate and the pusher plate;

FIG. 5 is a block diagram of the finger assembly;

FIG. 6 is a block diagram of a first arcuate screen;

FIG. 7 is a diagram of a second arcuate screen;

FIG. 8 is a block diagram of a third arcuate screen;

FIG. 9 is a view showing the structure of the combination of the finger assembly and the vibration plate in the preferred embodiment;

FIG. 10 is a block diagram of a castor cleaning plant in a preferred embodiment;

FIG. 11 is a block diagram of a castor combine harvester;

FIG. 12 is a block diagram of a picking station;

FIG. 13 is a side view of the picking station;

FIG. 14 is a block diagram of a picking unit (not including lateral brushes);

fig. 15 is a top view of a combination of two recovery rolls;

fig. 16 is a combined side view of two recovery rolls;

FIG. 17 is a structural view of a shaft body;

fig. 18 is a block diagram of a harvesting roller that does not include a lateral securing plate;

FIG. 19 is a structural view of a lateral fixation plate;

FIG. 20 is a view showing the construction of the straw cutting and returning apparatus;

FIG. 21 is a view showing a combination structure of the fruit container and the pouring device;

in the figure: 1-a castor cleaning device; 11-arc screen mesh; 111-circular arc piece; 112-a rod member; 113-an arc plate; 114-reinforcing ribs; 12-an arc-shaped top plate; 13-a propulsion plate; 14-a finger assembly; 141-finger dialing; 142-a thumbpiece holder; 143-adjusting plate; 144-adjusting the support; 145-a spring; 146-a roller; 15-a material input device; 151-cover body; 152-auger; 153-material inlet; 16-a hydraulic motor; 17-an end plate; 18-a vibration disk; 181-vibrating teeth; 19-a transmission gear; 110-a vibration motor; 2-moving the vehicle body; 3-picking platform; 31-a transverse conveying device; 311-material conveying trough; 312-a bidirectional auger; 32-picking the individual frames; 33-a crop divider; 34-a harvesting roller; 341-shaft body; a-a boss portion; c-edge blocking part; b-mounting the groove; 342-a bristle assembly; d-a connecting part; e-a limiting part; h-a protrusion; 343-a fixed pressure plate; f-an abutment; g-a barrier; 344-lateral fixing plate; an i-shaped hole; 35-longitudinal conveying means; 36-a power input shaft; 37-a coupler; 38-lateral brush; 4-a fruit collecting box; 5-a pneumatic conveying device; 51-a delivery conduit; 6-straw crushing and returning device; 61-device frame body; 62-crushing knife roll; 63-flail knife; 64-a second link; 65-a second adjusting oil cylinder; 7-a suspension device; 71-a first link; 72-a first adjusting oil cylinder; 8-a dumping device; 81-a support frame; 82-turning over the rotating shaft; 83-lifting oil cylinder.

Detailed Description

The present invention will be further described with reference to the accompanying drawings.

The castor cleaning device 1 shown in fig. 1-3 is provided with a cylindrical cleaning passage formed between an arc-shaped screen 11 and an arc-shaped top plate 12, wherein the arc-shaped screen 11 is positioned at the lower side, the arc-shaped top plate 12 is positioned at the upper side, and the arc-shaped screen 11 and the arc-shaped top plate 12 are both in a semicircular shape when viewed in the axial direction and are combined into a cylinder, and the hollow part of the cylinder is the cleaning passage; as shown in fig. 4, a plurality of pushing plates 13 are arranged on the inner wall of the arc-shaped top plate 12 in a linear array, the pushing plates 13 are sheet-shaped, and two ends of the pushing plates 13 are staggered in the axial direction of the arc-shaped top plate 12, preferably, the pushing plates 13 are spiral sheet-shaped structures, and the pushing plates 13 are semi-circular when viewed in the axial direction of the arc-shaped top plate 12; a finger-moving assembly 14 is arranged in the cleaning channel, and the finger-moving assembly 14 is provided with a plurality of groups of fingers 141; the finger-moving assembly 14 can integrally and actively rotate relative to the arc-shaped screen mesh 11, and the rotating shaft of the finger-moving assembly 14 is coaxial with the central shaft of the cleaning channel.

Preferably, the front end of the cleaning channel is connected with a material input device 15. Specifically, the material input device 15 comprises a hood 151 butted against the front end of the cleaning channel and an auger 152 installed in the hood 151; the housing 151 has a material inlet 153; the auger 152 is coaxially mounted with the finger assembly 14 and is capable of positive rotation relative to the housing 151. Preferably, the auger 152 is coaxially fixed with the finger assembly 14 and is driven by the hydraulic motor 16 to operate therewith.

The castor cleaning device 1 is applied to a castor combine harvester shown in fig. 11, and the castor combine harvester comprises the castor cleaning device 1 and a moving vehicle body 2; a picking platform 3 and a fruit collecting box 4 are respectively arranged on the front side and the rear side of the movable vehicle body 2; the castor cleaning device 1 is arranged on the upper side of the fruit collecting box 4; the movable vehicle body 2 is also provided with a pneumatic conveying device 5 for conveying the materials obtained by the picking platform 3 to the castor cleaning device 1.

The castor cleaning device 1 has the following working principle: when the castor cleaning device 1 works, the hydraulic motor 16 drives the auger 152 and the finger-moving assembly 14 to rotate simultaneously, materials harvested by the picking platform 3 of the castor combined harvester are conveyed to the castor cleaning device 1 by the pneumatic conveying device 5 and are pushed into the cleaning channel through the auger 152, on one hand, the materials can be fully stirred by the rotation action of the finger-moving assembly 14, so that the castor capsules in the materials are separated and fall into the fruit collecting box 4 through the sieve holes on the arc-shaped sieve mesh 11, on the other hand, the materials rotate in the cleaning channel by the finger-moving assembly 14, and can move backwards in the cleaning channel under the action of the pushing plate 13, so that the materials move backwards in the cleaning channel while being fully stirred, so that the castor capsules can be fully separated, and the materials such as useless branches and leaves are finally discharged from the rear side of the cleaning channel.

Preferably, the rear end of the arc-shaped top plate 12 is located more rearward than the rear end of the arc-shaped screen 11 in the traveling direction of the material, and the rear end of the arc-shaped top plate 12 has an end plate 17. Thus, the rear side of the cylinder body formed by combining the arc-shaped screen mesh 11 and the arc-shaped top plate 12 is provided with a material outlet, and materials such as useless branches and leaves are finally discharged from the material outlet.

Preferably, as shown in fig. 5, the finger assembly 14 includes three sets of the fingers 141 arranged in a circumferential array; the fingers 141 in the same group are all fixed on the finger rest 142 and are arranged in a linear array at equal intervals on the finger rest 142, and the finger rest 142 can adjust the position in the radial direction of the arc-shaped screen mesh 11.

Specifically, the two ends and the middle part of the finger-moving bracket 142 are respectively provided with an adjusting plate 143, and the adjusting plate 143 is provided with a strip-shaped hole; the finger-moving assembly 14 further comprises three adjusting brackets 144, three adjusting plates 143 on each finger-moving bracket 142 are respectively mounted on the three adjusting brackets 144 through screws penetrating through the strip-shaped holes, when the position of the finger-moving bracket 142 needs to be adjusted, the screws are loosened, the positions of the adjusting brackets 144 are adjusted and then screwed, and therefore the distance between the top ends of the fingers 141 and the arc-shaped screen cloth 11 can be adjusted, the cleaning effect is adjusted, and fruits are prevented from being injured.

In a preferred embodiment, as shown in fig. 9 and 10, the finger rest 142 is slidably connected to the adjusting plate 143, the relative sliding direction between the two is axial to the rotating shaft of the finger assembly 14, a spring 145 is disposed between one end of the finger rest 142 and the adjusting plate 143, and a roller 146 is mounted at the other end of the finger rest 142; in addition, the end plate 17 is rotatably provided with a vibration plate 18, a circumferential array of vibration teeth 181 is arranged on one end surface of the vibration plate 18, the end plate 17 is further provided with a transmission gear 19 and a vibration motor 110 which has a driving relation with the transmission gear 19, and a clutch unit is arranged between the transmission gear 19 and the vibration plate 18. By adopting the structure, under the normal use state, the roller 146 on the finger support 142 is kept in the concave pit between the vibrating teeth 181 by the pressure action of the spring 145 on the finger support 142, and the clutch unit is in the off state, the vibrating disc 18 rotates along with the finger support 142, and the finger support 142 does not axially move; when the cleaning channel is blocked, the clutch unit can be engaged, and the vibration motor 110 is controlled to operate, so that the finger-moving bracket 142 reciprocates in the axial direction under the action of the vibration teeth 181, and the blocked materials can be loosened by vibration, and the blockage can be relieved.

In a first embodiment, as shown in fig. 6, the sieve bend 11 is composed of a plurality of arc pieces 111 and a plurality of rod pieces 112, all the arc pieces 111 are linearly arranged at equal intervals in the axial direction of the arc pieces 111, and all the rod pieces 112 are arranged in an arc array around the central axis of the arc pieces 111; each rod piece 112 and each circular arc piece 111 are in a connection relationship;

in a second embodiment, the curved screen 11 comprises a curved plate 113 having a plurality of holes and a plurality of reinforcing ribs 114 fixed on the curved plate 113, and the holes on the curved plate 113 may be circular as shown in fig. 7 or square as shown in fig. 8.

In the above castor combine harvester, the picking platform 3 is mounted on the moving vehicle body 2 through the suspension device 7, as shown in fig. 11, the suspension device 7 includes two first connecting rods 71 and one first adjusting cylinder 72, wherein two ends of each first connecting rod 71 are respectively hinged on the moving vehicle body 2 and the picking platform 3, four hinged points on the two first connecting rods 71 form four corner points of a parallelogram, the first adjusting cylinder 72 is mounted between the moving vehicle body 2 and the picking platform 3, so that the ground clearance of the suspension device 7 can be adjusted by driving the first adjusting cylinder 72 to operate, and the inclination angle of the picking platform 3 is not changed during adjustment.

As shown in fig. 12, the picking station 3 comprises a plurality of picking units, and further comprises a transverse conveying device 31 connected with the conveying pipe 51; as shown in fig. 13, each picking unit comprises a picking unit frame 32, and two crop dividers 33, two harvesting rollers 34 and two longitudinal conveying devices 35 are symmetrically arranged on the picking unit frame 32; two of the dividers 33 are mounted at the front end of the picking monomer frame 32, the dividers 33 being used to guide castor crops between the two harvesting rollers 34; the harvesting roller 34 is used for brushing the castor capsules on the castor crop, and the brushed material is conveyed to the transverse conveying device 31 by the longitudinal conveying device 35 towards the rear side.

The longitudinal conveying device 35 is an auger conveying device, the transverse conveying device 31 comprises a material conveying groove 311 and a bidirectional auger 312 which is rotatably installed in the material conveying groove, the bidirectional auger 312 is installed in the material conveying groove 311, two sets of spiral parts which are opposite in rotating direction are arranged on the bidirectional auger 312, and when the bidirectional auger rotates, the two sets of spiral parts convey materials on two sides of the material conveying groove 311 to the middle part of the material conveying groove and output uniformly.

Preferably, as shown in fig. 14, the inclination angle of the picking monomer relative to the ground is 30 °, and when the picking monomer is harvested, an included angle of about 90 ° between the castor stalk plant and the harvesting roller 34 can be realized, which is beneficial to harvest the castor capsules and can effectively reduce the harvest loss.

Each picking monomer is provided with a power input shaft 36 respectively, the power input shafts 36 are used for connecting power and transmitting the power to the picking roller 34 and the longitudinal conveying device 35, the power input shafts 36 of adjacent picking monomers are connected through a coupler 37, one power input shaft 36 is connected with a power source, all the picking monomers are driven by the same power source, the driving cost can be saved, in addition, the picking monomers adopt a modular design, the rapid design of different harvesting line models such as three lines, six lines and the like can be realized, meanwhile, the adjustment of different planting line distances of 70-90 cm can be realized according to the agricultural requirements of castor planting in different areas, and the picking table 3 has good adaptability.

The harvesting roller 34 comprises a shaft 341 and a brush component 342, each harvesting unit is provided with a pair of harvesting rollers 34 (as shown in fig. 15-14), after the castor plant enters between the two harvesting rollers 34, the harvesting rollers 34 rotate at high speed to make the striking force generated by the brush component 342 strike the castor capsule, so that the brush on the brush component 342 is a vulnerable component and needs to be replaced frequently.

In order to allow the bristle module 342 to be quickly replaced with respect to the shaft body 341, as shown in fig. 17, three boss portions a extending in the axial direction of the shaft body 341 are formed on the shaft body 341 so that three mounting grooves b for mounting the bristle module 342 are formed in the circumferential direction of the shaft body 341; each boss part a is provided with a flange part c extending towards two sides at one end facing outwards; the base of the bristle component 342 is provided with a connecting part d for connecting bristles and two limiting parts e extending from the root of the connecting part d to two sides; as shown in fig. 18, two bristle assemblies 342 and one fixed pressing plate 343 are mounted corresponding to each mounting groove b; the two position-limiting parts e of the base of each bristle assembly 342 are respectively limited by the edge-limiting parts c and the fixed pressing plate 343; the fixed pressing plate 343 is detachable with respect to the shaft body 341.

Preferably, the fixed pressing plate 343 is T-shaped, and has an abutting portion f abutting against the bottom of the mounting groove b and two blocking portions g for limiting the limiting portion e. When the fixed pressing plate 343 is mounted on the shaft body 341, since the abutting portion f abuts against the bottom of the mounting groove b, the fixed pressing plate 343 is mounted more firmly without being loosened.

Through the structure, the base of the bristle assembly 342 itself does not need to be installed on the shaft body 341 through fasteners such as screws, and the two bristle assemblies 342 in the same installation groove b can be installed on the shaft body 341 through one fixed pressing plate 343, so that the quick assembly and disassembly of the harvesting unit 12 can be realized. Specifically, when the bristle assemblies 342 need to be detached, the fixed pressure plate 343 is detached first, and then the two bristle assemblies 342 corresponding to the fixed pressure plate 343 can be taken out; when a new bristle assembly 342 needs to be installed, corresponding to the same installation groove b, the bases of the two bristle assemblies 342 are respectively placed in the installation groove b, one limiting part e of each base is embedded in a gap between the edge blocking part c and the groove bottom, the fixed pressing plate 343 is placed, the two blocking parts g of the fixed pressing plate 343 press the other limiting parts e of the two bases respectively, and finally the fixed pressing plate 343 is fixed relative to the shaft body 341. Compared with the scheme that each base is fixed on the shaft body 341 through a screw independently, the operation process is obviously convenient, and the operation efficiency can be improved.

Preferably, a straw crushing and returning device 6 is installed on the lower side of the moving vehicle body 2. As shown in fig. 19, the straw crushing and returning device 6 comprises a device frame body 61, a crushing knife roller 62 and a flail knife 63; a plurality of groups of flail knives 63 are arranged on the crushing knife roll 62, and the crushing knife roll 62 can rotate relative to the device frame body 61; the device frame body 61 is arranged on the movable vehicle body 6 through a second connecting rod 64 and a second adjusting oil cylinder 65, so that the ground clearance of the crushing knife roll 62 can be adjusted by driving the second adjusting oil cylinder 65 to achieve better crushing effect.

As shown in fig. 20, one side surface of the fruit box 4 is an inclined surface, and the fruit box 4 is mounted on the movable vehicle body 2 by the tilting device 8; dumping device 8 includes support frame 81, upset pivot 82 and lift cylinder 83, and the upside on the inclined plane that upset pivot 82 will collect fruit case 4 articulates on support frame 81, and lift cylinder 83 connects collection fruit case 4 and support frame 81, through the upset of the steerable collection fruit case 4 of control lift cylinder 83 for the material is poured along the inclined plane.

According to the castor cleaning device and the castor combined harvester, the material harvested by the picking platform enters the cleaning channel, and under the rotating action of the finger-pushing assembly, on one hand, the material is fully stirred, so that the castor capsule in the material is separated and passes through the sieve mesh of the arc-shaped sieve, and on the other hand, the pushing plate on the arc-shaped top plate pushes the material to move in the cleaning channel, so that the separation of the capsule and the branches and leaves is realized, the cleaning effect is good, and the impurity rate of the obtained castor capsule is low.

The above description is only of the preferred embodiments of the present invention, and it should be noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the invention and these are intended to be within the scope of the invention.

Claims (9)

1. A castor cleaning device (1) is characterized by comprising a cylindrical cleaning channel, wherein the cleaning channel is formed between an arc screen (11) and an arc top plate (12);

a plurality of pushing plates (13) are arranged on the inner wall of the arc-shaped top plate (12) in a linear array mode, the pushing plates (13) are sheet-shaped, and two ends of each pushing plate are staggered in the axial direction of the arc-shaped top plate (12);

a finger-moving assembly (14) is arranged in the cleaning channel, and the finger-moving assembly (14) is provided with a plurality of groups of fingers (141); the poking finger assembly (14) can integrally and actively rotate relative to the arc-shaped screen (11), and the rotating shaft of the poking finger assembly (14) is coaxial with the central shaft of the cleaning channel.

2. A castor cleaning plant (1) according to claim 1, characterized in that the rear end of the arched ceiling (12) is further rearward than the rear end of the arched screen (11) in the direction of travel of the material.

3. A castor cleaning plant (1) according to claim 1, characterized in that the front end of the cleaning channel is connected with a material input device (15).

4. A castor cleaning plant (1) according to claim 3, characterized in that the material input device (15) comprises a hood (151) interfacing with the front end of the cleaning corridor and an auger (152) mounted within the hood (151); the cover (151) has a material inlet (153); the auger (152) is coaxially mounted with the finger-moving assembly (14) and can actively rotate relative to the cover body (151).

5. A castor cleaning plant (1) according to claim 1, characterized in that said finger assemblies (14) comprise a plurality of sets of said fingers (141) arranged in a circumferential array; the same group of the fingers (141) are fixed on a finger support (142), and the position of the finger support (142) can be adjusted in the radial direction of the arc-shaped screen (11).

6. A castor cleaning plant (1) according to claim 1, characterized in that the arcuate screen (11) comprises a plurality of arcuate segments (111) and a plurality of bars (112), all of the arcuate segments (111) being linearly arranged at equal intervals in the axial direction of the arcuate screen (11), all of the bars (112) being arranged in an arcuate array about a central axis of the arcuate segments (111); each rod piece (112) and each circular arc piece (111) are in a connection relationship;

or the arc screen (11) comprises an arc plate (113) with a plurality of screen holes and a plurality of reinforcing ribs (114) fixed on the arc plate (113).

7. A castor combine harvester, characterized in that it comprises a castor cleaning plant (1) according to any one of claims 1 to 6, and further comprises a mobile vehicle body (2); a picking platform (3) and a fruit collecting box (4) are respectively arranged on the front side and the rear side of the movable vehicle body (2);

the castor cleaning device (1) is arranged on the upper side of the fruit collecting box (4);

the mobile vehicle body (2) is also provided with a pneumatic conveying device (5) for conveying the materials obtained by the picking platform (3) to the castor cleaning device (1).

8. The castor combined harvester of claim 7, wherein the lower side of the movable vehicle body (2) is provided with a straw crushing and returning device (6).

9. A castor combine harvester according to claim 7, characterized in that the picking station (3) comprises a plurality of picking units, further comprising a transverse conveyor (31) connecting the conveying pipes (51); each picking monomer comprises a picking monomer frame (32), and two grain dividers (33), two picking rollers (34) and two longitudinal conveying devices (35) are symmetrically arranged on the picking monomer frame (32);

the crop divider (33) is arranged at the front end of the picking single frame (32) and is used for guiding castor crops to a position between the two harvesting rollers (34);

the harvesting roller (34) is used for brushing out the ricinus capsule, and the brushed-out material is conveyed to the transverse conveying device (31) by the longitudinal conveying device (35) towards the rear side.

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